This collection of essays celebrates 50 years since the founding of the Taylor-Schechter Genizah Research Unit at Cambridge University Library. Three generations of scholars contributed their research and memories from their time at the GRU, stretching back to 1974. Their work comprises 18 articles on medieval Jewish History, Hebrew and Arabic manuscripts, archival history, and the story of the Cairo Genizah collections at the University of Cambridge. Together, they demonstrate the achievements of GRU alumni in advancing the field of Genizah Studies for more than five decades.

This volume presents an edition of a corpus of Arabic documents datable to the 11th and 12th centuries AD that were discovered by the Egypt Exploration Society at the site of the Nubian fortress Qaṣr Ibrīm (situated in the south of modern Egypt). The edition of the documents is accompanied by English translations and a detailed analysis of their contents and historical background. The documents throw new light on relations between Egypt and Nubia in the High Middle Ages, especially in the Fatimid period. They are of particular importance since previous historical studies from the perspective of Arabic sources have been almost entirely based on historiographical sources, often written a long time after the events described and distorted by tendentious points of view.